Motion of a ball down a cliff

You are standing at the top of the cliff that has a stairstep configuration. There is a vertical drop of 6m at your feet, then a horizontal shelf of 10 m, then another drop of 4m to the bottom of the canyon, which has a horizontal floor. You kick a .93 kg rock, giving it an initial horizontal velocity that barely clears the shelf below. The acceleration of gravity is 9.8 m/s^2. Consider air friction to be negligible. What initial horizontal velocity [tex]v[/tex] will be required to barely clear the edge of the self below you.

I actually determined a solution for this problem (see edit) but thank you! I did have equations shown and attempted work but incidentally, I erased it all when I found a solution. It took me a while to find it but I'm slowly beginning to understand.